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AD7707 Datasheet(PDF) 34 Page - Analog Devices

Part # AD7707
Description  3 V/5 V, -10 V Input Range, 1 mW 3-Channel 16-Bit, Sigma-Delta ADC
PDF  40 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7707 Datasheet(HTML) 34 Page - Analog Devices

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REV. A
AD7707
–34–
AD420
DAC
CONTROL
ROOM
AD7707
DVDD
+5V
AIN2
REF IN(–)
AGND
MCLK IN
MCLK OUT
REF IN(+)
AVDD
AIN1
LOCOM
2.5V
AIN3
VBIAS
HICOM
DGND
MICRO-
CONTROLLER
ACTUATOR/
VALVE
10V
SMART
VALVE/ACTUATOR
RSENSE
Figure 25. Smart Valve/Actuator Control Using the AD7707
AVDD
REF IN
4.7 F
100k
MCLK IN
MCLK OUT
AD7707
MICROCONTROLLER UNIT
•PID
•RANGE SETTING
•CALIBRATION
•LINEARIZATION
•OUTPUT CONTROL
•SERIAL COMMUNICATION
•HART PROTOCOL
VCC
COM
VCC
BOOST
REF OUT1
REF OUT2
REF IN
AD421
C1 C2 C3
COM
LOOP
RTN
COMP
DRIVE
4.7 F
0.01 F
0.1 F
2.2 F
DN25D
1k
1000pF
0.01 F
0.01 F
0.0033 F
SENSORS
RTD
mV
MAIN TRANSMITTER ASSEMBLY
4mA
TO
20mA
AGND
DGND
THERMOCOUPLE
V
AVDD
AIN1
3V
1.25V
AIN2
AIN3
Figure 26. Smart Transmitter Using the AD7707



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